I have namechanged as am identifiable on MN and don't want to out the family involved.
Background - recently I was a doula for a woman who had become a single parent whilst pg with her 7th baby. Of her older DC, two have SN and the youngest has delayed speech. Since being her doula I have become good friends with her and am meeting weekly and have started going to a baby group with her.
She told me the HV has been wanting to weigh her youngest (now nearly 9 weeks) weekly 'because she is BF'. Baby was 6lb 8oz at birth and is now 8lb 5oz. I pointed out that she was under no obligation to go and have her weighed, and she said she felt under pressure to agree as the HV was concerned she was not engaging with services and was hinting at SS involvement. The other services she has refused to engage with were sending her 23 mo to nursery (apparently essential as he has delayed speech) and refusing vaccinations (people may not agree but its a legal and valid choice on her part).
So she is having a different HCP appear at the door every week, with different scales, wanting to weigh the baby. She finds it intrusive and unnecessary esp. as none of them seem to know much about BF 
She is not very confident in dealing with the pressure, and is also severely dyslexic so has difficulties with accessing information/guidelines/making formal complaints and so on. She has asked me for advice on what if anything she can say or do to get them to stop it - any suggestions?